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  #16  
Old 03-07-2010, 05:35 PM
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Hey RentAMan i got a question for you i have a post under this section and the modular 4.6/5.4L . It says "PLEASE HELP CRACKED EXHAUST MANIFOLD".... Can u take a look at it read it and let me know if u have any input for me
thanks
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  #17  
Old 03-07-2010, 05:39 PM
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Talking

Sounds like he is giving you a guarantee that it will never go bad.
Let him have at it, if you want it done.
Just remember, you get one try to do it.
You haven't lost anything by trying it.
If it gives you problems afterwards, there really isn't any fixing it.
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  #18  
Old 07-27-2014, 08:11 PM
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Heli coils work great for me so long as they are installed properly. A little anti-seize goes along way to avoiding plug problems
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  #19  
Old 07-28-2014, 08:23 AM
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for 50 bucks, I would go for it.

no one really answered "why do these blow out" questions.......the root cause is compression build up due to carbon build up and the point of failure is the spark plug threads. run some carbon cleaner once in a while.
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  #20  
Old 07-28-2014, 08:42 AM
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for 50 bucks, I would go for it. no one really answered "why do these blow out" questions.......the root cause is compression build up due to carbon build up and the point of failure is the spark plug threads. run some carbon cleaner once in a while.
Now that's a theory I've never heard before. Can you explain to the class how carbon buildup would cause the threads to fail?
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  #21  
Old 07-28-2014, 09:20 AM
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While I don't believe that the decrease in combustion chamber volume and the increase in net compression ratio would "cause" a plug to blow out - it is known that combustion chamber deposits can cause detonation / pre-ignition and the resulting pressure increases are known to be extreme and could contribute to the failure of the threads..
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  #22  
Old 07-28-2014, 06:19 PM
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Get a used timesert kit from ebay. You can resell it for little loss. That's what I did, did all 10 inserts, resold the kit. My post on this is in the V10 section.
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  #23  
Old 07-28-2014, 06:34 PM
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When using a heli-coil you run the risk of it blowing out with the plug. In some cases it damages the head beyond repair. Ive seen it many times on 4.6L cars.

Also this thread is 4 years old
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  #24  
Old 07-28-2014, 06:34 PM
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When using a heli-coil you run the risk of it blowing out with the plug. In some cases it damages the head beyond repair. Ive seen it many times on 4.6L cars.

Also this thread is 4 years old
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  #25  
Old 07-28-2014, 06:37 PM
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When using a heli-coil you run the risk of it blowing out with the plug. In some cases it damages the head beyond repair. Ive seen it many times on 4.6L cars.

Also this thread is 4 years old
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  #26  
Old 07-28-2014, 07:34 PM
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Originally Posted by Big-Foot View Post
While I don't believe that the decrease in combustion chamber volume and the increase in net compression ratio would "cause" a plug to blow out - it is known that combustion chamber deposits can cause detonation / pre-ignition and the resulting pressure increases are known to be extreme and could contribute to the failure of the threads..
They blow out from plugs being too tight or too loose and heli-coils have a BAD reputation. They can't just blow out from high pressure or the top fuelers' would blow all eight every time. Not detonation either.
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Old 07-28-2014, 07:34 PM
 
 
 
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